 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.texteditor;

 /**
  * Extension interface for {@link org.eclipse.ui.texteditor.IElementStateListener}.
  * It adds
  * <ul>
  * <li> state validation notification
  * <li>a notion of session, i.e. a notification about an upcoming element change and error handling.
  * </ul>
  * @since 2.0
  */
 public interface IElementStateListenerExtension {

     /**
      * Notifies that the state validation of the given element has changed.
      *
      * @param element the element
      * @param isStateValidated the flag indicating whether state validation is done
      */
     void elementStateValidationChanged(Object element, boolean isStateValidated);

     /**
      * Notifies that the given element is currently being changed. This method may
      * be sent from a non-ui thread.
      *
      * @param element the element
      */
     void elementStateChanging(Object element);

     /**
      * Notifies that changing the given element has failed.
      *
      * @param element the element
      */
     void elementStateChangeFailed(Object element);
 }

